jwtcreate.php

<?php 
function base64UrlEncode($data)
{
    return str_replace(['+', '/', '='], ['-','_',''], base64_encode($data));
}


$key = 'secret';

$header = [
    'typ' => 'JWT',
    'alg' => 'HS256'
];

$payload = [
    'uid' => 1,
    'username' => 'admin',
];

$header = json_encode($header);
$payload = json_encode($payload);


$header = base64UrlEncode($header);
$payload = base64UrlEncode($payload);


$sign = hash_hmac('sha256', $header . "." . $payload, $key, true);
$sign = base64UrlEncode($sign);

$token = $header . '.' . $payload . '.' . $sign;

print $token;
// setcookie("token", $token);


?>